Journal of the Department of Agriculture of Western Australia, Volum 17

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Department of Agriculture., 1908
 

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Passatges populars

Pàgina 708 - LO Howard, chief of the Bureau of Entomology of the United States Department of Agriculture, and...
Pàgina 759 - When thou shalt besiege a city a long time, in making war against it to take it, thou shalt not destroy the trees thereof by forcing an axe against them: for thou mayest eat of them, and thou shalt not cut them down (for the tree of the field is man's life) to employ them in the siege...
Pàgina 566 - First. An absence of large numbers of microorganisms and the entire freedom of the milk from pathogenic varieties.
Pàgina 560 - Beets and the roots of a few other vegetables are attacked by the disease, but the fungus may persist in Infected soil for several years without the presence of known host plants. Badly Infested soils should be devoted to such crops as grains, grasses, and clovers, for as long a time as possible. Fertilizers favorable to scab should be avoided and " souring " the soil by green manuring Is recommended.
Pàgina 560 - For large quantities of seed, formaldehyde gas, generated by the use of potassium permanganate, is the most practical disinfecting agent. Place seed tubers in bushel crates or shallow, slat-work bins in a tight room. For each 1,000 cubic feet of space spread 23 ounces of potassium permanganate evenly over the bottom of a large pan or pail in center of room. Pour over this 3 pints of formalin, leave room at once and allow to remain tightly closed for twenty-four to forty-eight hours.
Pàgina 592 - In the manufacture of superphosphates, the phosphate is first ground to a fine powder, then mixed with sulfuric acid. The acid dissolves the phosphate, and two parts of the lime which are combined with the phosphoric acid in the tricalcic form are first set free, and then combined with the sulfuric acid, making a superphosphate (monocalcic), and a sulfate of lime or gypsum. That is, in this process, two of the three parts of the lime combined with the phosphoric acid to form the insoluble phosphoric...
Pàgina 594 - ... of the same fineness showing rather a lower rate of solubility than the phosphates in steamed bone. The phosphate in finest steamed bone is much more soluble than that of the coarser grades. This measure of the rate of solubility of bone, while not. perhaps, showing the exact rate at which the plants may obtain it. is a fairly safe guide in its use for most crops, as compared with those mineral phosphates which are not perceptibly soluble in this medium. The range of solubility in different kinds...
Pàgina 566 - The objects of the commission are to establish correct clinical standards of purity for cow's milk; to become responsible for a periodical inspection of the dairy under its patronage; provide for chemical and biological examinations of the product, and the frequent scrutiny of the stock by competent veterinarians. Three general requirements or standards of quality for the milk have been formulated: First. An absence of large numbers of microorganisms and...
Pàgina 560 - ... of a few other vegetables are attacked by the disease, but the fungus may persist in Infected soil for several years without the presence of known host plants. Badly Infested soils should be devoted to such crops as grains, grasses, and clovers, for as long a time as possible. Fertilizers favorable to scab should be avoided and " souring " the soil by green manuring Is recommended. On clean soils, only healthy, disinfected seed tubers should be used. Manure containing uncooked scabby potatoes...
Pàgina 822 - CROPS. As just stated, corn requires a strong, well-tilled soil, and upon thin land, deteriorated by bad management, the yield soon drops below a remunerative average. Such lands will, however, profitably produce other crops of great value for the sustenance of farm stock, and, in addition, the growing of these crops will provide an excellent means of soil renovation. Lands that are now producing 10 bushels of corn per acre will with much less labor produce...

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